[all-commits] [llvm/llvm-project] fe58ee: [Clang] Only allow `clang` arguments to `-Xarch` (...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fe58eee60200c91b5b4131e9dc73a5e870b3cf4d
      https://github.com/llvm/llvm-project/commit/fe58eee60200c91b5b4131e9dc73a5e870b3cf4d
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2025-02-06 (Thu, 06 Feb 2025)

  Changed paths:
    M clang/lib/Driver/ToolChain.cpp
    M clang/test/Driver/Xarch.c

  Log Message:
  -----------
  [Clang] Only allow `clang` arguments to `-Xarch` (#126101)

Summary:
Currently the `-Xarch` argument needs to re-parse the option, which goes
through every single registered argument. This causes errors when trying
to pass `-O1` through it because it thinks it's a DXC option. This patch
changes the behavior to only allow `clang` options. Concievably we could
detect the driver mode to make this more robust, but I don't know if
there are other users for this.

Fixes: https://github.com/llvm/llvm-project/issues/110325



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